Optimization of the Care Pathway for Patients With Chronic Pain: Assessing the Value of Integrating Sleep Specialists

Inclusion Criteria: * First consultation at the pain management center * Patient with chronic pain as defined by the "Haute Autorité de Santé". The pain must have several of the following characteristics: * Persistence or recurrence * Duration beyond what is usual for the presumed initial cause, especially if the pain has been evolving for more than 3 months; * Inadequate response to treatment; * Important and progressive deterioration of the patient's functional and interpersonal abilities in activities of daily living at home, school, or work due to the pain. * Patients with chronic primary pain (according to the typology defined by the International Classification of Diseases-11) and classified into one of the 4 following categories: * Chronic generalized pain * Complex regional pain syndrome * Chronic primary headache or orofacial pain * Chronic primary musculoskeletal pain * Pittsburgh Sleep Quality Index (PSQI) must be completed by the patient and the score must be available (for randomization purposes) * Have access to an internet connection as a self-administered questionnaire is to complete online, and at least have access to the online platform for CBT treatment if insomnia is detected * Affiliation to a French social security system * Free informed consent Exclusion Criteria: * Patients undergoing cancer treatment or who have completed treatment within the last 2 years * Patient with a chronic inflammatory disease (e.g. rheumatoid arthritis, ankylosing spondylitis, chronic inflammatory bowel disease, Horton's disease, Wegener's disease, myositis, Still's disease, lupus erythematosus, etc.) * Immunocompromised patient * Patient with severe psychiatric pathology that does not allow study follow-up (at the discretion of the investigator) * Patient already treated for a sleep disorder by a sleep specialist (the only prescription of hypnotics is not considered as a criterion of non-inclusion) * Patient follow-up difficult (for geographic motives or other reasons) * Patient under judicial protection of incapable adults or guardianship * Refusal to participate in the research